Spiral Fluted Taps (for blind hole)Spiral Fluted Taps(for through hole)Spiral Pointed Taps(for through hole)Hand TapsCementedCarbide TapsRoll TapsSpecial Thread TapsSimple Inspection ToolsPipe TapsThread MillsPremium Thread MillsDiesCenter DrillsCentering Tools ANSI ⑧ Pipe Tap Series Overall Thread Shank Size of Length oflengthlengthdia.squaresquareLℓDsKℓk ANSI ① NPT-CI Hand Taps for American Taper Pipe Threads for Cast Irons ② Specification ■Suitable for hard and abrasive materials such as cast irons. ③ Nitride Recommended Tapping Speed depending on Materials Cast irons Ductile cast irons 鋳鉄 強靱鋳鉄 〜5 〜5 ④ (m/min) (m/min) TYPE:1 TYPE:2 ⑤ Projection Projection Segment:1G ⑥ Size Class Code Chamfer L(inch) ℓ Projection Ds(inch)(inch)(inch)K(inch)ℓk(inch) No. offlutes TYPE For American Pipe Threads 1/8-27 NPT ANSI G Y83201 3P 2.125 0.75 0.312 0.437 0.328 0.375 4 1 1/8-27 NPT ANSI G Y83202 3P 2.125 0.75 0.312 0.312 0.234 0.375 4 2 ⑦ 1/4-18 NPT ANSI G Y83203 3P 2.437 1.062 0.459 0.562 0.421 0.437 4 1 3/8-18 NPT ANSI G Y83204 3P 2.562 1.062 0.454 0.7 0.531 0.5 4 1 1/2-14 NPT ANSI G Y83205 3P 3.125 1.375 0.579 0.687 0.515 0.625 4 2 3/4-14 NPT ANSI G Y83206 3P 3.25 1.375 0.565 0.906 0.679 0.687 5 2 ⑧ 1 -11 1/2 NPT ANSI G Y83207 3P 3.75 1.75 0.678 1.125 0.843 0.812 5 21 1/4-11 1/2 NPTANSI GY832083P41.750.6861.3120.9840.93752 1 1/2-11 1/2 NPT ANSI G Y83209 3P 4.25 1.75 0.699 1.5 1.125 1 7 2 2 -11 1/2 NPT ANSI G Y83210 3P 4.5 1.75 0.667 1.875 1.406 1.125 7 2 ⑨ ⑩ ⑪ ANSI ⑧-83 ※ This product is different from JIS products in shape and dimensions, please be careful when using.